Spark Plugs

At U.S. Boating & Marine Supplies, shop marine spark plugs, boat spark plugs, outboard spark plugs, inboard engine spark plugs, and marine ignition components from trusted marine and engine-parts manufacturers.

Marine Spark Plugs for Boat Engines

The spark plug is a critical part of the marine engine ignition system. It delivers the electrical spark required to ignite the compressed fuel-air mixture and support combustion inside the engine. Marine spark plugs are available for a wide range of outboard motors, inboard engines, sterndrive applications, and other gasoline-powered marine engines.

Popular marine spark plug applications include:

• Outboard motor spark plugs
• Inboard marine engine spark plugs
• Sterndrive engine spark plugs
• 2-stroke outboard spark plugs
• 4-stroke outboard spark plugs
• Replacement boat spark plugs
• Marine ignition system components

Champion Marine Spark Plugs

Champion is a well-known manufacturer of spark plugs, and ignition components used across numerous engine applications. Champion spark plugs are available in different configurations and heat ranges for specific engine applications.

When replacing spark plugs, always match the engine manufacturer, model, year, horsepower, spark plug type, heat range, thread size, reach, and manufacturer's recommended part number.

Choose the Correct Marine Spark Plug

Using the correct spark plug is important for maintaining the engine manufacturer's specified ignition and combustion characteristics. Spark plug specifications can vary significantly between marine engines, even when engines have similar horsepower ratings.

Before ordering, check your engine's OEM spark plug number and application information to ensure the replacement plug is compatible.